Classify the following into pure substance and mixtures
(a) Air
(b) Copper
(c) Silver
(d) A sugar solution
(e) Wind
(f) A salt solution
(g) Carbon dioxide
(h) Water
(i) Nitrogen
(j) Iron
(k) Oxygen
(l) milk
(m) Blood
(n) Gold
(o) Brass
(a) Air - mixture
(b) Copper - pure substance
(c) Silver - pure substance
(d) A sugar solution - mixture
(e) Wind - mixture
(f) A salt solution - mixture
(g) Carbon dioxide - mixture
(h) Water - mixture
(i) Nitrogen - pure subs.
(j) Iron - pure substance
(k) Oxygen - pure substance
(l) milk - mixture
(m) Blood - mixture
(n) Gold - pure substance
(o) Brass - mixture
Explanation:
Matter can be broken down into two categories: pure substances and mixtures.
Pure substances are further broken down into elements and compounds.
Examples: Gold, Oxygen, Nitrogen
Mixtures consist of two or more different kinds of particles or two or more pure substances mixed together but not chemically bound.
Example: The sugar solution is a mixture because it can be separated into its constituents by physical processes (like evaporation). It shows the properties of both sugar and water.
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